∞ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
powersave
∞ zcat /proc/config.gz | grep -i freq_gov_powersav
# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
∞ echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo: write error: invalid argument